Chuck.



Patented Jan. 22, I901.

Z. T. FURBISH.

CHUCK.

(Application filed June 15, 1898.)

(No Model.)

UNiTsn TATss ATET Fries.

ZAOHRY T. FURBISII, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE NORTH BROTHERS MANUFACTURING COMPANY, OF SAME PLAOE.

CHUCK.

SPEEIFIGATION forming part of Letters Eatent No. 666,507, dated January 22, 1901.

A li ti n filed June 15, 1898. Serial No. 683,470. kNo model.)

To (LZZ whmn it may concern: ide, as shown in Fig. 5, and recessed at a, Be it known that I, ZAOHRY T. FURBISH, a and within this recessis a coiled spring E, citizen oi the United States, residing in Philahaving one arm which is extended through delphia,Pennsylvania,haveinvented certain an opening in the body and bent within a Improvements in Chucks, of which the folslot ta The other arm of the spring extends lowing is a specification. over the flattened portion of the body and My invention relates to certain improveinto a groove 61 in the sleeve D, so that the ments in chucks in which a ball is used to tendency of the spring is to keep the portion secure the hit to the stock. (I of the sleeve D always back of the ball, so [0 My invention is especially applicable to that the ball is normally projected into the small chucks used to secure drill-bits to the opening for the bit, as in Fig. 3; but by turnstocks of ratchet-drills; but it will be undering the sleeve against the pressure of the stood that it can be used for any purpose for spring the recess (1 is brought back of the which a chuck is intended. ball, as shown in Fig. 4, so that the ball will 15 In the accompanying drawings, Figure 1 move back out of the opening for the bit. is a plan view, partly in section, of my im- The body A of the chuck is secured in the proved chuck. Fig. 2 is a sectional view on socket A of a drill stock or handle by means the line 2 2, Fig. 1. Fig. 3 is a section on the of a screw f, which is preferably formed as line a: 00, Fig. 2. Fig. at is a section on the shown in Fig. 1. By simply removing this 20 same line as Fig. 3 with the ball out of enscrew the chuck can be removed from the gagemeut with the bit. Figs. 5, 6, 7, and 8 drill-stock and its parts can be readily exam are detached perspective views of parts of the ined or repaired. chuck, and Fig. 9 is aview of a modification. As a substitute for the spring shown in A is the body of the chuck, adapted to a Figs. 1 and 2 I may use a coiled spring.

25 socket A and secured therein by a screw-pin (Shown in Fig. 9.) This spring is adapted to f. The chuck-body has a suitable cavity for a cavity formed partly in the body of the the reception of the bit, and in this body is chuck and partly in the sleeve, so that the an aperture a, in which a ball B is located. tendency of the spring is to hold the sleeve The aperture (1 is preferably tapered and in aposition to project the ball into the open- 0 narrow at the base, so that the ball will proing for the bit, as shown in Fig. 3. 8o ject in the opening for the bit only a certain I preferably form a transverse groove a in distance and will not fallout when the bit is the body A at the end of the opening for the removed. bit, and I insert in this groove a bar '6, which The bit 0 is notched at its rear end and extends into the opening, forming an abut- 35 adapted to engage the notched portion of the ment for the bit.

body, so that the strain of turning is not I claim as my inventiontaken by the ball but by the body, and the 1. The combination in a chuck, of a body bit is notched at c, and this notch is of suflihaving an opening for the reception of a bit, cient width to receive the ball B, which is an aperture or hole in said body, an unat- 4o locked therein and prevents any longituditached movable piece constructed to operate nal movement of the bit. in the aperture,a sleeve for keeping said piece In order to throw the ball into and out of projected into the opening for the bit, a stop engagement, I mount on the body A, between independent of the movable piece in the body its flanged head a" and the end of the socket and a groove in the sleeve for the reception 45 A, a sleeve D, having a slot d, into which the of the movable piece when the bit is to be reball can pass when the bit is to be released, moved, said groove being common both to the as shown in Fig. 4. The movement of the movable piece and to the said stop, substan: sleeve is limited by a stop cl, which projects tially as described. into a slot d in the sleeve. 2. The combination of the body having an 50 The body of the chuck is flattened on one opening for the bit and a transverse hole,

with a ball adapted to the hole, the opening being such as to allow the ball to project a certain distance into the opening for the bit, a sleeve mounted on the body having a groove therein adapted to be shifted in line with the hole for the ball so that the ball will enter the said groove, a stop to limit the lateral movement of the sleeve, and a spring lending to keep the sleeve against the stop, substantially as described.

3. The combination of a body having an opening for a bit and having a tapered hole, a ball adapted to said hole, a sleeve mounted on the body and having a recess into which the ball can pass, a stop to limit the movement of the sleeve, a groove in the sleeve, a spring secured to the body and having an arm projecting into the groove in the sleeve, said spring tending to keep the sleeve in such a position that the ball will normally project into the opening for the bit, substantially as described.

at. The combination of a body having an opening for a bit, a tapered hole comm unicating with said opening, a ball adapted to said hole and extending into the opening a certain distance, a sleeve having a recess into which the ball can pass, a spring tending to keep the sleeve in a given position, a crossbar mounted in the groove in the body and forming an abutment adapted to engage the notched portion of the bit, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ZACHRY T. FURBISH.

Witnesses:

WILL. A. BARR, Jos. H. KLEIN. 

